Safety-valve.



6.1. MANNING.

SAFETY VALVE.

APPLICATION FLLED FEB. 23. 1917. RENEWED APR. 3, |918.

Patented May 7 GLEMAN J. MANNING, OF MEIFORD, MASSACHUSETTS.

SAFETY-VALVE.

Lacasse.

Specication of Letters Patent.

Patented 'tray t', wie.

.Application filed' February 23, 1917, Serial No. 150,315. Renewed April 3, 1918. Serial No. 226,529.

Valves, of which the following is a speci-- I'ication.

r1`his invention has for its object to provide an improved construction and arrangement of parts in a spring-closed safety valve, whereby a simple and effective valve is rovided. f

Ehe invention also has for its ob]ect to provide a registering valve structure, 1n-

cluding an indicator adapted to register the pressure existing in a pneumatic tire, or`

other reservoir, containing air or other Huid under pressure.

rlhe invention is embodied in the improvements which l will now proceed to describe and claim.

Of the accompanying drawings, forming.

Fig. 2 is a sectionon line 2 2 of Fig. 1.A

Fig. 3 is a section on line 3 3 of Fig. 1. Fig. 4 is a section on line 1 4 of Fig. 1.

Fig. 5 is an end view. of the rock-shaftand its wrist-pin-carrying hub, hereinafter referred to, showin means for' radially adjusting the wrist-pm.

Fig. 6 is a section on line 6 6 of Fig. 5.

Fig. 7 is a side elevation, showing the safety valve applied to a pneumatic tired wheel. i

Fi 8 is an enlargement of a portion of Fig.

Fig. 9 is a view partly in section but otherwise similar to Fig. 8, showing a modification.

The same reference characters indicate the same parts in all of the igures.

The casing of my improved safety valve includes two detachably connected sections 12 and 13, said sections having screwthreaded fianges whereby they are separably connected, as clearly shown by Fig. 1. The section 12 contains a recess 12a, and the section 13 contains a recess 13, said recesses registering and inclosing a relatively large space.

Clamped between the sections 12 and .13

is .a exible diaphragm 14., which subdivides Said space into a pressure-receiving chamber having an inlet 16 and a spring chamber containing a re erably volute spring 17, which norma ly l maintains the diaphragm in position to contract the pressure chamber of which it forms one side, ras shown by Fig. 1.

Attached to the central portion of the diaphragm 14 and movable therewith, is a tubular stem 18, adapted to slide in a guide 19 formed in the casing above the spring chamber, the stem 18 having an air t1ght connection with the diaphragm by means of clamping-nuts 21, 22, screwed u on its lower end, as shown by Fig. 1. Incldentally, the upper clamping-nut 21 forms an abutment for the spring 17.

The bore or' the tubular stem 18 communicates at one end with the pressure chamber, and at the opposite end with a chamber 23 at the upper end of the casing, said chamber having a vent to the atmosphere, so that vfluid pressure passing through the valve stem, enters the chamber 23 and escapes therefrom.

The lower end of the stem bore is provided with a valve seat 25, which is normally closed by a relief valve 26. Said valve is provided with a rod 27 extending through the tubular stem 18 and into the chamber 23. A relatively light spring 28, seated at one end on anabutment in a cavity in the stem 18, and at its opposite end on an abutment or shoulder 29, attached to the rod 27, normally exerts pressure on the rod to close the valve 26.

The bore of the stem 18 and a portion of the perimeter of the rod 27 form a relief duct 30, which permits the passage of fluid under pressure from the pressure chamber to the vent chamber, when the valve 26 is open, this duct being conveniently formed by the cutting away of a portion of the periphery of the rod 27.

The casing is provided with an abutment 31 arranged to contact with the upper end of the rod 27 when said rod is raised to a predetermined height by pressure acting on the dia hragm, and thus arrest the movement o the rod 27 and valve 26, so that the continued movement of the diaphragm and its stem will separate the valve seat 25 from the valve 26, and thus permit pressure to escape through the duct 30.

The abutment 31 is referably a head formed on the stem 82 0F a valve 33, which is normally held by the spring 31 in posi- :leoneses with ears l, shown by dotted lines in Fig.

2, to receive attaching screws 52. The lower section l2 of the casing is provided at one side with a dat face 53 (Fig. l), receiving- 5 another attaching screw 5%. The indicatorbox attached as described to the casing sections l2, 18, prevents either section from turning relatively to the other. The tubular stem 18 is provided With a head or enlargement 55, one side of which contains a slot 56 receiving an eccentric Wrist-pin 5T rigidly connected with a rock-shaft 58 which extends through the tubular shank 49 into the indicator-box 50. The head 55 is provided `with a flat side n (Fig. 3), in

sliding Contact with a dat sided tace'" formed in the casing, to prevent the stein and its head 4from tnrningthe slot 56 being thus caused to face in the proper direction. Said roclr-shaft is provided with an enlargement or huh 59 adapted to turn in the shanli e9. rllhe Wrist-pin 57 may he rigidly or iininovahly connected with the halo 59, as indicated ov l. lr' desired, however, the Wrist-pin may he radially adjustable on the halo, as shown by 5 and 6, the Wristpin being provied with a 'slotted ear GO, the slot @l or which receives a loess 62 on the enter face of the huh 59, as shown hy Figs. 5 and il. ci dipinti-screw 63 engaged with. the hnlo 59 and passing through the slot 6l adinstahlv secures the Wrist-pin to the huh,

ts the radial adjustment of the Wrist-pin to vary its throw, and the extent Bil the recit-shaft hv movements ci? the stein ld ln the einhodiinent or the invention shown hy Figs l, 2, S, 7, and 8, the rochshitt carries pointer 65, which is movable the rocheshaft over a graduated sector t the lower portion of a dial A helical spring 6T en? ged at one end with lined part, such ne shanir 9, and at its other with the hub 59, exerts torque in one ection on the roca-shaft to prev nt lost or loose of tne Wrist-pin 57 in the alot 56.

T the. embodiment the invention il, a 'fach 68 is at n enter end of the roch-shaft on the huh of i is onnted to swing the center oi' the dial, 1' described niore- 55 and its stein ts orP the of pgesonq is at all on UV is p "Qerahly offset as o that the main portion 'i ,in one sine l? the n'cor ox and the Spie osite side. Protne casing oiE rotary inoveinent imported to it and to nninicatin with the usual valve portion V located between adjacent spokes of the Wheel YV, and for preventing objectionable projection of the casing, indicator-box, and nipple from the sides ci the Wheel.

l do not limit Inj/self to the described adaptation of the invention to pneumatic tires, it being obvious that the invention may he embodied in safety valves for various other purposes.

I claim;

l. A safety valve comprising a. casing having an inclosed space, a pressure inlet communicating with one side of said space, and a pressure outlet communicating with the opposite side thereoil and provided with a normally closed dust-excluding valve, a. diaphragm forming one Side of a pressure receiving chamber communicating with said inlet, a spring normally holding the diaphi-aghi in position to'contract said chamber, a guide in the casing', a tubular stein attached to 'the diaphragm and movable in said guide, the bore or said stem opening into said chamber and having a valve seat, and a spring-pressed reliei2 valve normally closing said seat and provided with a rod movable with said stein, the rod and stem forming a ielieiQ duct communicating with. the pressure outlet, and an abutment in the casing arranged to contact with the valve ineens being provided for simultaneously opening the relief valve and the Outlet valve when the diaphragm is displaced.

A safety valve comprising a casing having an inclosed space, ii pressure inlet communicating with one side of said space, and a. presseie outlet communicating with opposite side thereof, a diaphragm forming one eide oia e pressure-receiving chainher coniiniinicatii'ig; with said inlet. spring normally holding the diaphragm in position to contract said lianiber, a guide in the casing, a tubular stein attached to the diephrani and movable in said guide, the bore or eaid stein opening into' said chamber and having a valve seat, a springprcseed relief valve normally closii said seat and provided with a rod extending through and movable with eaid stein? the rod and stein refining a relief duct coinvfith the pressure outlet, :i dust- -f .ire or seid outlet, liar' 'i through the ouf e 1105i, apted to normally the ce yield to the displacing lre rod,

space, one section nakng a pressoirv qniet and the other an ont a diep @in 1 L- 'M =`.pad cette seid sections Ell' iiu

forming one side of a pressure chamber communicating with said inlet*` a tubular stem attached to and' movable with said diaphragm, a guide in the casing for said stem. a relief valve associatedl With said stern. means responsive to movements of the diaphragm for opening and closing said valve, an indicator-box attached to the casing, a passage being provided between the said box and the interior of the casing, and indicating means including a rock-shaft in said passage, connections between said rockshaft and the tubular stem, and a pointer movable by the rock-shaft, the nipple having a rigid external shoulder and being provided With an elastic cap having a contracted end adapted to detachably engage said shoulder.

1l. A safety valve casing having a sha-nk containing a pressure inlet and provided with an internally threaded socket, adapted to engage a threaded tire valve, and a reinforcing sleeve slidable on said shank and engaged therewith to permit a sliding movement without rotation. the sleeve being internally formed to slidingly engage a standard tire valve Without rotation thereon, so

that the shank and casing are prevented by the sleeve from turning on the tire valve.

l2. A safety Valve casing having a shank containing a pressure inlet and provided with an internally threaded socket, adapted to engage a threaded tire-valve, and a reinforcing sleeve slidable on said shank and engaged therewith to permit a sliding movement Without rotation, the sleeve being internally formed to slidingly engage a standard tire valve Without rotation thereon. so that the shank and casing are prevented by the sleeve from turning on the tire valve.l the shank being provided with a laterally projecting valved nipple, and the sleeve being recessed to receive said nipple When the sleeve is displaced from its operative position.

13. A registering safety valve casing comprising sections separably Connected by screw-threads, and an indicator-box seated on and attached to each of said sections, and preventing independent rotary movement of either section.

In testimony whereof I have afiixed my signature.

CGLEMAN J. MANNING. 

